Justin makes a deal to obtain evidence that could prove his arson theory while Billie struggles to adapt to the harsh physical demands of tree planting. Meanwhile, Maisy attempts to draw out her mother’s lies with a boring AGM, but nothing seems to crack Mimsy’s veneer.

Justin crashes Jayne’s Aqua Spin class to interrogate arson suspects. Billie is torn between her personal and professional life, and Maisy uses a “spa day” to extract medical samples from Mimsy.